Methods, systems, and products authenticate a user to a device. A user selects or submits a media file for authentication. Features in the media file are compared to a set of criteria for authentication. The number of matching criteria, that is within a range of values for each criterion in the set of criteria, is determined. The number of matching criteria is compared to a threshold value. When the number of matching criteria equals or exceeds the threshold value, then the user that selected or submitted the media file is authenticated.